Hertel K010341AS Thread Forming Tap 8-32 Unc 2B Bottoming Hss

Product Description

The HERTEL K010341AS is a bottoming thread forming tap designed for 8-32 UNC internal threads in blind hole applications. Unlike cutting taps, this tool displaces material to form threads without producing chips, making it well suited for ductile metals commonly encountered in mechanical and electrical assembly work. Manufactured from high-speed steel with a bright, uncoated finish, it carries a 2B class of fit and an H3 thread limit for consistent dimensional accuracy. Overall length is 2.125 inches with a thread length of 0.75 inches and a shank diameter of 0.168 inches. Licensed machinists, tool-and-die technicians, and maintenance professionals use this tap with a standard tap wrench or tapping head.

This tap is intended for blind hole threading where chip evacuation is a concern and the work material is sufficiently ductile to allow thread forming. The bottoming chamfer of 1-2 threads allows threading close to the bottom of a blind hole, maximizing thread engagement depth in confined spaces. Typical applications include tapping aluminum, mild steel, brass, and similar ductile materials in production machining, maintenance repair, and precision assembly environments.

Key Features

• Thread forming design displaces material rather than cutting, eliminating chips in blind hole operations
• 8-32 UNC thread form with 2B class of fit for standard fastener compatibility
• H3 thread limit ensures consistent oversize control for proper fit tolerance
• Bottoming chamfer (1-2 threads) allows threading near the base of blind holes
• High-speed steel construction provides durability across a range of ductile workpiece materials
• Right-hand thread direction; compatible with standard tapping equipment and tap wrenches

Compatibility

Designed as an OEM-style replacement or direct-use thread forming tap for blind hole 8-32 UNC applications requiring a 2B class of fit and H3 thread limit in ductile metallic workpieces.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with tapping operations. Secure the workpiece firmly and ensure the tap is started square to the hole to prevent cross-threading or tap breakage. Apply an appropriate cutting or forming fluid for the workpiece material to reduce friction and extend tap life. Always back the tap out periodically if resistance increases, and never force a forming tap into a material that is too hard or brittle for the thread forming process.